The iPhone 5s slow motion video might not be true 720p, experiment against the Note 3 shows

Apple touts the slow motion video capability in its new iPhone 5s, equipped with an upgraded iSight camera and a powerful 64-bit A7 processor. It turns out, as a little experiment has shown, that it might not be a true 720p slow-mo with 120fps, but rather upscaled from 480p.
The experiment was done against the new Galaxy Note 3 from Samsung, which features true 720p slow motion effect in its video camera settings. The regular 720p video captured with the Note 3 shows noticeably more detail than the allegedly 720p one from the iPhone 5s in the same circumstances, as you can see from the video screenshots below.
source: GSMArena